As an Ana main, she can do quite a lot. Sure, 80 damage with a 1.25 fire rate isn't all that spectacular. However this can be combo'd into a double shot within close game ticks if you're accurate. After some of her changes, the ticks are further apart, but it's faster than the normal 1.25. An easier comparison is the first shot's effect ends right as the second is applied. The duration is approximately .9 seconds. Her sniper when hipfired as actually a projectile, when scoped it's hitscan. If you hipfire, and then scope and take the shot you can land tons of unexpected damage. While it's pretty difficult to pull off, but if you're good at landing Genji's Shurikens at long range this will be even easier. This is also super handy for ult charge. Done right, it will give you 13.20% ult charge like two normal shots, except a little faster than just left click spam.

This was a lot stronger on release when her fire rate was faster, and her damage ticks were shorter, but it's still pretty useful if you're looking to Min/Max.

That being said, you can get two shots, the grenade and a melee attack in the duration it takes to get up from a sleep dart even without this trick(For 250 damage in total).

2716 Ana(Support in general)/Soldier main. All three seasons I've had trouble climbing from plat RIP.

I think alot of Ana's strengths come from her ability to hold her own while simultaneously healing allies.
A guaranteed 80 damage per shot on a target is not much compared to snipers for instance, but being a squishy on the receiving end of a shot or two can quite easily put you in a tough position.

If you're a 200 health hero and ana gets a shot on you, you're now within the instant kill shot damage of a sniper. Two shots and the vast majority of projectiles in the game will kill you. Its not even the fact that ana can kill most enemies in 3 shots, its the fact that she can scare away potential threats with even a single shot.
And lets say you get close to an ana and start getting hits on her, she can easily throw a grenade at her feet, this can damage you for 60 points, heal her 100 health and deny you any healing, I use this tactic all the time on squishies who think they can chase me and get a kill, turning around, throwing a grenade and getting aggressive can take anyone by surprise.
Lastly you have her sleep dart, which can stop fraggers dead in their tracks. Sure, the shot is a life-or-death shot most of the time, but the fact that she can simply put you to sleep and walk away is a huge defensive ability.
Add all of this on-top of her unparalleled healing capability and lethal ultimate and you've got yourself a damn strong support.

Her main weakness is tanks, as her only form of defence against them is her sleep dart and her teammates, as her damage is not enough to deal with their larger health pools. 3600, Ana/Lucio/Rein main, they said the salt ends after diamond, it doesn't..

It would be your homeowner's insurance that pays any medical bill associated with them slipping on your driveway. Yes it's their fault they slipped, it's not your responsibility to put up a sign, but it's still you or your insurance that would pay (if that fall actually hurt them)